Woodworking machine



Aug. 9,1927.

L. E. BLOOD WOODWORKING MACHINE Filed D601. 16,. 1.926 4 Sheets-Sheet 1 llllllll Aug. 9, 1927. 1,638,652

| E. BLQOD WOODWORKING MACHINE Filed Deo. 16, w26 4 sheets-smet 2 Aug. 9, 1927.

L. E. BLOOD woODwoRKING MACHINE Filed Dec. 16, 1926 4 sheets-sheet `5 I 31a/'enig W:

` Laureiweli' Blood,I 3 y @M5/M7 "ii/pg? Aug. 9,1927.

* L. E. BLOOD WOODWORKING MACHINE Filed Dec. 16.. 1.926 4 sheets-sheet 4 y fwmw.. Laeeme Eiood,

Patented Aug. 9, 1927.v

LAURENCE E. BLOOD, or BOSTON, ivIAssAcnUsE'rTsAssIG-NOR fro s. A;Woons'1\itA-' CHINE COMPANY 0F BOSTONMASSACHUSETTS, A CORPORATION or MAssAcHU- sETTs. v i

f WOODWORKING' MACHIJSTE.

'AppIication filed December 16, 1926. Serial N o. 1551 89. i

'i 'This' invention relates to Woodworking machines and aims to provide in such ama? chine a cutter, the'y operative position-of reference tothe vaccompanying drawings',

ferred to.

Referring 'to 'Fig- 48, I have there jreprewhich Will be governed by the Work .on which it acts. The construction mayv be, and in practice ordinarily Would be, e1nbodied in a profiler formingl a partofa planing or matching machine having cutters to dress thevvood, theprofiler acting subsequently to the other cutters of the machine.

My invention Will be Wellunderstood by Whereinis disclosed such portion ofa Wood- Working machine of the type referred to las is necessary for; an understanding vof the present `invention,"an'd in these drawings :--v

Fig. 1 kisan filer; f

Fig', 2 is a side elevation; Fig;` 3 is a sectiononthe Fig. 1;

. Fig. lis a plan View With parts'omitted and parts broken away;

'Fig 5 lis a .section on line of the line vv5-;5 -of Fig.y 7 is a section on the line 7;'7 of Fig. 1;'and

Fig. 18 isa diagrammatic vievvto :be re sented in a conventional man-ner a board b Vsuch as might beldelivered from a matching machine With-its four sides Vfinished by the :usual top, bottom and'side cutter heads passing over' a: supporting table T. 'Ihave illustrated in a diagrammatic manner airotary cutter head c operating on this board to form grooves therein- This operation is commonin thefpreparationf of ceiling and beaded sheathing. The importantv thing .f aboutsuch grooves is'the depth asV measured from v the upper` surface ofthe board in Ythe position of Fig. 8. In'othervvords,.theaxls ofrotation of the cutter head should'be ,a

Y definite .distance fromthe finished'jupper surface of the'jboard.` If one board-is thin A nerthanV another and theI grooves'jare to ingly vary and thejdistance from the .tops

be cut-the vsame depth, thedistance ofthe cutter from' thetable yT should correspondend elevation of the top' pro-l `6 ai'perspective vievv of thechip; breaker bar andthe tensioning mechanismf 'of the boards should remain constant. i

therefore desirableto provide al machine in bythe upper surface of the Work -on'vvhich chine, ifthere is, abreakage andone yboard i which theposition ofthe cutter is governed it act-s. Also, in the operation ofasuch ma*` rides onv topl of the other, the tcutterfmay be raised and Will continue to operate on'the 'upper board, finishing it `in vproper manner and continuing in this Way v untiltlfie dif-l` ir culty is removed.

the cutter and Whichqwould ordinarily be the boards after they have passed through Y' the customary cutters adapted to dress the four sides thereof. u k

Referring toFig. 2, on the denominatedv the cutter ;head stand and Vside ofthe machine there issupported the frame f for the profiler mechanism-which mayloefff`J 80 which embodies the sides 11 connectedby upperand lower "CIOSs members '13 and 15',"

'as bestshown in Fig. 3. `Mounted.forgbodily' vertical movement uponthisstand is a cutter rea-d yoke'vvhich may take the form v(see Fig. 1) of a substantially"rectangu-larframe having vertical side members land I19 connected` by upper and lowery transverse. mem;

be Well understood,` ,passing through thek central opening of the frame. f- The vertical bers" 21 and23 respectively, thework, as will l'sides 17. and 19gpr.ovide'for the support of Y) the `shaft ofthe rotatingcutter head@ icon-fv ventionally illustrated inthe igures, and,1 f

have herein shown the-.party17...as provided' with a suitable bracket orishelf 24,011 which is mounted a bearing, 26 integral vvijththe end plate 25 of theelectric motor7 the-armature shaft of-Which'is continued at'27 tore# -ceive the cutter .headyc', .the-shaft also-being supported inasuitable outboardbea'ring 29l carried by ay lsomewhat similar` shel'ffi or bracket on theopposite side 19 of frame. To support the'cutter head yokeonthe stand theasidey members 17 anelli)` may, bfe lprovided (seevFig. 4)Withf1an`gee3 over;

lying the sides ofV the' upright Aframe memJ befskll tof which flanges, er@ -imchd Eby i' i i f to bolts llthe gib plates v35 providingfa Way l orgroove receiving the sides of lthe uprights "v on which the cutter head yoke slides as on a Y Q of the machine and as seen in Fig. 4 thc s y provided by the sides ofthe uprights ll are track. 1 This .-gib connection provides more` particularly` forfrestrainingthe cutter head yoke from'movementsivhich might be coilsidered as partial rotations longitudinally relatively narrow longitudinally of the 'ms-uchine'and' Widely spaeed, transversely thereof.` To further restrainthe yoke, particularly 1 .against movement corresponding to rotations transversely of the machine, 'there 'may be`v secured to :the crossmembers 125 and Y i f adaptedto be 'received in suitable Ways on the transverse cross me1nbers2l and 23 'of ce Ythe yoke,"the connection in the former in- 'embodying affixed lan'ge'll and an adjust-- stance being' shown in detailk in F las f able l gib F43 secured'by screwsk l5 andr backed upthe'bolts 47 resting;against flange e9, the gib blockz39. being similarly guided on the cross member 23 :of theyoke, Y Particularlybecause' of the weightpoflhe:driving soy "pints'vandfthe blocks areprelativelynarrow.

y motorthe strains tending torotater the yoke transversely of themachine are severe. The

gibbedconnection provided. bythe blocks 37 andi-39 'resist-such strains" at Widely spaced Similarly the gibsprovided lbylthe sides of 'Y the'uprights .ll-are '(see Fig. 4l) 'narrow Yrrvlongitudinally of themaehine Vbut widely `-spaced transversely-thereof.L An adequate and eflicient guiding is thusp'rovided.

' Y JillV y "QTo provide for supportingthe cutter head yoke-from the 'Work the uppercross member '2l-may havehtseevllilg. 3).lafdownward esn tension 5l yterminating'fin a Amorejor less upright depending flange y53 -to which may be secured by`4 the bolt jandffslot connection shov'vmfwhich provides for .i'fertical ,adjust ment, one ofthe flanges ofthe angular ehip- I breaker]v bar"55v which" may have itsV edge Y portions `V(see Fig.. 6) guided in suitable Ways atfthe-jsi'des ofthe 'flange 53 provided for by 'suitable rearwardly v directed flanges Y 57 thereon towvfhich are secured the gib pilates '59., "-.llo lfthe rearwardly :directed flange of thezf Y thelfb'olt' andfslot Vconnectiony illustrated in Figj B, Which:V provides-v for an Y Yadjustmeiotv hip-breakerbar'maybe secured by vf'longitirdinally'lof thefmachine, a series Iof "j'shoesf'lithe "ends-of which are adapted to upon Work Vand, by means of the y 'adjustments described, may be located in rlijzed'relation to the'jperipghery fof the adsv `vjacent 'cutter Vheadjc. ',.Irn rthe rnormalgopera- 'tionof the partsY VWhereinftheeutterfhead i Hyoke yreciprocatesf.thefbolts"supporting` ,the :chip-breaker jbar 55V and the shoes tifare clamped@sothatthe'reis'no movement in the f: f" l 65" .`Sl'ot s"`f'andk vvillfbe. understood Vthat asV a board approaches frointhe right in Figzt Thus, in such la machine `asis illustrated the Weight of the yoke, motor 'and the like provide means whereby' the eifectivepressure exerted vuponthe Work by the innov-v i ing parts may be VAdeter'rninately varied might be in the neighborhood of1500 pounds y lL and With "a struct-ure Vmerely such as has Y,

been so far described the shoes V61 would bear With this pressure on the vvork andthe cutter head Would lbe pressed .down against the Work @under this greatgvveight.y yBy means of suitable mechanism, an illustrative example of which l am about tofdescribe,

this Weight may bein part counterbalaricedY so that therpressure upon thel Work may be only such as to give theV bestV resultsa Vllorinst-ance, it. might be. desirable to` makel it V'equivalent to a weight of about 40v pounds.`

Referring to Fig. l, I have hereinfshown as extending from :the-'lower' crossfA member 23 of the cutter vhead yoke substantially inline with the center Ofgravity of the yoke, motor, etc.,`a screwshaft 63 swivelled in a bracket 65 onfthe lower crossmemberfand adapted to be' turned .through lthe' fmitfrel gears 67 by means ofv a horizontal'y lshaft 69 extending along said cross memberV and having itsl end 7l presented at the sideoil the f s machine for convenient manipulation, *theV c i end 71 being. .herein shown-assquared ,to

receive a .removable crank in .the nature of a socket Wrench. The'screwf'l taps into .a threaded'j block or `nut Avvvhich maybe provided, as shown in Fig.'j7, vvith suit-ablei a dovetailed' ribs ywhereby it lis non-rotatably butV slidab'lyYV held in a dovetaileditvvay i forming a bracket ,77, `secured to Aone of the side ,frames 9V of the l machine. Reverting l to Fig. l, the .end ofthe nutinayrest upon a vlever 79seeuredfto'a shaft 8l Vcarry!` ing a kcrank V83 to Whichisupivoteda rod'V f extending. out to Y one* side of,A the ,machir'ie'v vand 'passing Vadjacent itsvpivot through suitable fixed abutmentS; 'strongspring 89 vsurrounds thelrodfandbears on abutment 87.' .The tension ofthis spring'niayfibe ad-k justed by a suitable'n'ut 91, herein jshownrfas ztakingthe form -ofa hand Wheel, threaded lil) on the rod and: disposed at oneyside:of-the"V `machine. for'convenient access.y n' AsA clear from F ig',vv l, lthe Weightvof thefcutterhead yoke andthe parts carried thereby, acting through .the lever system described, ris co'un-V terbalanced `by the` tensionof the spring 89 'which may-bexadjuste'd ydesired zmeans of the nut 9,1. vThe vspring provides for vcounterbalaneiiug action Without sintroduc-Y ing an objectionable factor lof* inertia.-ln

other Words, it readily reacts to movement.

of the yoke and at' the same time has no tendency to movel excessivelyfb'ecause -of momentum. There may also be placed un# der'the end of the arm A7 9 and in line lWith the nut 73 a suitable dash pot 93, notjneces saryto illustrate in detail. 1

TIt Will be clear that by turning` the shaft 69 the nut-73T- Will be screwved up or'down lWhich the andthe leg-like support which the'nutzand screw provide `Will be extended or contracted so as to give an initial vertical adjustment -tOthe'cutter headyoke system Which Will have no effect Whateverupon the counterbalancing thereof. That is,` a' vertical ad-' justment is 'provided for which will not affect the predetermined pressure with proiiler mechanism acts upon the Under certain circumstances, it mayA be desired temporarily iiXedly to position the cutter head Vyoke so thaty itsposition Willnot bev governed bythe upper surface of the Work but `Will be definitely related to the ixedsurface over which the Work passes.

Under these circumstances, the shoes 61v may be utilized as'yielding chip-breakershoes.

-I shall next describe suitable means Wheree by the mechanism may be'convertedin this manner.v Y

For clamping the'v cutter head yoke i in fixed vertical position on thev cutterhead stand I may provide the mechanism'best shown in Figs. l and Zand comprising 'eye bolts95`passing :through the flanges '33 and gib, plates 35 of the cutter head yokefthe eye portions bearingonpressure blocks 97 v lresvtn'ig against. said plates and receivingV at eachside ofthe machine a vert-ical rod 99 vhaving one side flattened off," as shown in .'Fig. 5, the rod acting in themanner of a cam shaft. When the cutterhead floats the rods 99 are turned to Apresent their Hat surfaces toward the vgib"plates 35 and the bolt's'exe'rt no clamping action.` /Vhenit is desired to .clamp the cutter headv yoke against vertical movement, the rodsfare of.l i For operating the rods 99 (see Fig/1)v turnedjto the'positionshotvnin Fig. 'and the gib plates 35 are'forcedwvitha clamping pressure against the side membersl 17 vand 19 AWith which they cooperate. lTo facilitate the clamping action the flanges 33 may. be 'cult away as indicated 100 in Fig. ,aso that the gibs 35 aregsupported onfva'relatively narrow land at Athe outer edge thereone may -be providedwith a' handle101-an`d bymeans of thejsingle handle 101 may bef'connected by the parallel/"cranks 103 and connectingrodflO to the vrod' 99 at the opposite side ofthejmachine 'so ythat.

the two rodsl may be peratedffin vunison Referringnovv to Figsfand 6, Whenthe @ttf-$15* head. yoke iS [S0 "..Clampea the 1 bolts .Semelle Chip-breaker bari V55 to as. aange lowing claims-z f l53 may belslacked offto permit the' breaker bar to reciprocate substantially ver'-y v tically` on .-thef'latter; this.ibeing'permitted by.'l thev lslot 'connection shown; To 'provide` l a `yielding tension on'the shoes 61 Iffmay utilize the mechanism best shovvnin Fig; 6. As'thereshown,` the chip-breaker' bar 55 is suspended by the rods 1.05,y pi'votedfthereto on 'either side fr'omcrank/ arms V107 secured may be journalled in brackets'1l1`and'113i secured, as best shown in Fig. '15 to thefup per vcross member,` 11 of the cutter head* frame. Suitable set screws, 1155 Vprovided on these` brackets limit tht-rockingi'no've`- 4 tion corresponding to downward' movement of the chip-breaker. fTofpi-ovideIa-yielding tennsioifron` theehiplbreaker the shaft 105."

may be provided at one sidevvith an'arm 117 to which ispivoted a threaded rod-119" passing through va suitable abutment f 121 a ',fment ofthe cranks and 'shaft inf onedirec-v carried fby' kbracket .111 againstV Which-rests spring 123 surrounding therod and adapted f* 90,'

to be tensioned by the terminal nuts' 1125.

thereon'. Upward VmovementV ofthe chiplV .I breaker bar obviously tendstorotate shaft f n 109jand arin'll'?v counterclockwise viewing Fig. 6, 'tensioning spring 123, -vbetyveen ythe 5 l nuts'125and-abutment 121. 1

To permit the pressurepof the chip.-'loreaker` to be quickly released When vdesiredthe .other end oit' the `shaft 109 maybe provided With arm V127v connectedv by a link 129to a .crank llmountedi onV the shortsliaft 133 having a supportingjournal 135 forming a part'of the bracket y113 but., omittedfor'fclearness i .I y' i. in Fig. p6,- whichyshaft vhas an" voperating handle v137 'conveniently located at. one'side 'y of the machine.v Turninghandle 137 rocks lon arm? 131 and'vvith4 i'tarm 127 andthechipf br'ea'kerr'may'ftlius be lquickly raised.7 manuy I "have described in detail one particular embodiment of'my invention but itfvvill be understood that the constructionandar? Y rangement ofp'arts mayfbe.'Widely-varied Jvithout departing from? yspiritfofl thel n invention.

by lLetters ldatenl combination with theftable :oyeravhifch the Work 'is' ed,`A a cutterl head` yoke freely 'recipe I ad* rocable` vertically and, carrying 'al'cutter overlying the'-table', "shoes carried b the `yoketoV ride on the Work on' theftable 'Wherea desired portie Y and Vpar-ts thereon. f

' 2.4In a Woodworking machine, in ,coirfibi-V nation-With the `tableover Whichpthe Work is fed, -a cutterhead Yyoke freely-reciprocable vertically and ,carryingacutter head. ,over-v lying the table, shoes lcarried byv the yoke yoke and parts thereon .free from' any addi- .tionalv factor of inertia.v` c A l Y A3. In a Woodworking: machine, infcombi Ynation with the .table over Which theiwork sffeda cutter head yoke freely reciprocable 'vertically `and carrying a cutter head overlying the table, shoes carried by, the yoke -V Vtos-rideonfthel work on thetable whereby Y to position saidk yoke, a lever on which the yoke may krest, a ,c'r'ank'turnigng ivith the 'leverra rod projectingroinsaid crank outf :Wardly beyond the side ofthe machine, yan

i abutment cooperating With. ,saidY trod, -a

spring-encirclingthe rod and resting on the' abutment, vand `a iiutthreaded .on thev outer c lld'of the ifodtor tensioningthe .spring to Aapply a .variable suppoiting;y force Yto theyoke. v

' 4. 'In iavvvoodworking machine, iii combii .nation Withithe table "overivliich the'Wo-rk V i ble vertically and V`calryiflg `Cutter head isfed, )a cutter head yoke freely reciprocaloverlying"the table, shoes carried by the yoke to ride o n the Work-on the table Where- ;by to position saidyoke, an adjustablecoun# 'Y terbalancing means .and meansforengaging 'Y the yoke vvithv saidm'eans having @provision for adjusting the normal yertical position of the; yoke independently of. .the ytension Y ,i of'said,'counterbalancing means.- ,e

V5. 'In .j alWoodworkingLinachine, in 7Com bination With the tableover :which the Work Y faces thereof and carryingga cutter-receiving Y fis fedyac/utter head yoke freely reciprocable vertically landcarrying a cutter head overlying the table, shoes carried by the l'yoke Vto ride onl the" Work" on the ktable '.Wherebyjioy kposition saidzjyoke, an extensible leg "de-v pending vf from the yoke, means comprising ing mechanism on' whichy said leg rests. 6. ra Y Woodworking machine,.in com- Y binationwithi the table` over which the Work gan operatinghaiidleat the'side of the may-fy chine. `for extending "ands contractingfthe sameandan adjustably `Iyieldible support- 'isf'fed,1 aQc-utter head yoke freely 'reciprocable vertically` carrying acutter head overi l vto. rideon therWoi'k onfjthetable 'ivhereby toy y position said yoke,`an Vextensible'legdependf 'i 60 :ing Vfrom, the` yoke, means co iiipris'ing ran foperatinghandle at. the.V sidevoff the machine for extending and contracting'the same, a

i yieldable support ,onivhichthe leg` rests and means comprising annoperating portiondisrposed lat. the side ofthe .machine orf'ad'- E justingthe resistance' of, saidsupplortj 7. In a Woodworking machine, in combina-V tion with the 'table' over Avvhich Vthe Work isy fed, Va cutter head yoke rfreely reciprocable vertically andy carrying a lcutter head overplyingthe table, slioescarried by the yoke to" :ride on 'the' Work on the! table Awhereby to position said yoke,V anextensible leg dependingrom the yoke, means comprising` van op? erating handle ,at the side voithe machine`V for extending and contracting the same, a

restbeneath ltlierfleg, Va spring acting onthe,V

rest to sustain the yoke, and means comprising an operating' portion disposedfatthe sideoil the machine for'adjustablyl tensioning the spring.

8. In a Woodworking machine, 'in-combina'- f ivtion with the table over which the'worklis fedfa cutter head stand comprising standards lateral of the table, a substantially .85

quadrilateral yoke encircling` said table, the

upright or side elements of said yoke fhav# f ing sliding `engagement kwith said Vstandards resisting rotativefmovement of thev Yyoke lengthwise of the machine, a driving motor carrying ak cutter-.receiving spindle V,Whiclfi v extendsV across the yoke, relatively` narrow gibbed connections onV the transverse elements of the yoke 'providingWidelyspaced guides resisting rotation of theyoke transc versely of the machine and shoes carried f'by the yoke adapted to ride on vthev Work and therebyV effect reciprocationV of 'the v yokey yalong the guiding means'djescribed., v Y

9. In a Woodworking machine, Vin combi.-

nation with the table over Whichvthe livork ,f c

is fed-,a cutter head stand,` a Vyoke carried- `thereby having shoes for contact with the Y Work ior reciprocation-'of Vsaid yoke thereby,

a driving motor supported from-'the yoke in Sover-hung relation to Vonefofthe fore andaft spindle, saidy lyoke having long-vertical yiange portions interlockingi the sta-nd to Vre.r

sist `rotative movements of they yoke longinarrow g'ibswidelyspaced at opposite sides losY Vof the table and resisting rotative movement of the yokeV transversely oiE ,thev machine.v

ing a driving motor having,acutter-receiv- ,ing spindle and means to supportv said yoke ontlie'ixed frame-Work of the machine,coniprising gibs narrow longitudinally f y'of .the machine and interlocking ythe yoke at Widely transversely spaced points thereof and other gibs f relatively narrow transversely of' the Y tically y spaced points thereof.' `11.'*In a machinejof the machine interlocking thefyoke at Yvv'ifdel'y vern classdescrirrbed,` in vv,combination with the cutter head 'stand isc' supportedon one of said sidey elements and 1in f tudinally of the v'machine and transversely l having guiding surfaces at the sides, the cutter head yoke having flanges overlying `said sides and gib plates extending inward- 1 ly over the sides thereof, releasable means for forcing said plates with a. clamping pressurev against the stand, a portion of said yoke providing supporting ways for a chip- "breaker bar, and means for alternatively ixedly or slidably securingthe bary in said.

Ways.

12. 'In a machine of the class described, in combination with thecutter head stand having guiding surfaces at the sides, the cutterV head yoke having flanges overlying said sides and gib plates extending inwardly over the sides thereof, said gibv plates having a clearance from the stand at the inward portions thereof, clamping means cooperating with said portions and theV stand and having name to this specication.

LAURENCE E.- BLoon. f

sides and gib plates extending inwardly lover the sidesV thereof, clamping devices at'the sides of the yoke cooperating with thestand for securing the former in fixed vposition on a n( t head kyoke having iianges overlying 'said the latter and having sliding connection with Vone of said parts to permit vertical m0vement of the yoke when the clamping devices are released, and means common to said defv vices on both sides of themachine and having a single actuating handle for simultaneously operating all said devices;

14. In a machine of the class described,

in combination, a cutter head stand, a cutter head yoke slidably associated therewith and having means for clamping it in posi-I` tion thereon, spring means for supporting the yoke, a chip-breaker bar slidably car-4 ried by the yoke with provision for immovably clamping the same,f shoes on the bar for contact with the work, and tensioning means v for said bar supported from the yoke.

In testimony whereof, I `have signed 

